1grav(6x)                      XScreenSaver manual                     grav(6x)
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NAME

6       grav - draws a simple orbital simulation
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SYNOPSIS

9       grav [--display host:display.screen] [--foreground color] [--background
10       color] [--window]  [--root]  [--window-id  number][--mono]  [--install]
11       [--visual  visual]  [--ncolors integer] [--delay microseconds] [--count
12       integer] [--decay] [--no-decay] [--trail] [--no-trail]
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14       [--fps]
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DESCRIPTION

17       The grav program draws a simple orbital simulation
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OPTIONS

20       grav accepts the following options:
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22       --window
23               Draw on a newly-created window.  This is the default.
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25       --root  Draw on the root window.
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27       --window-id number
28               Draw on the specified window.
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30       --mono  If on a color display, pretend we're on a monochrome display.
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32       --install
33               Install a private colormap for the window.
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35       --visual visual
36               Specify which visual to use.  Legal values are the  name  of  a
37               visual  class,  or the id number (decimal or hex) of a specific
38               visual.
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40       --ncolors integer
41               How many colors should be used (if possible).  Default 64.  The
42               colors are chosen randomly.
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44       --count integer
45               Default 12.
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47       --decay
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49       --no-decay
50               Whether orbits should decay.
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53       --trail
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55       --no-trail
56               Whether  the  objects should leave trails behind them (makes it
57               look vaguely like a cloud-chamber.
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60       --fps   Display the current frame rate and CPU load.
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ENVIRONMENT

63       DISPLAY to get the default host and display number.
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65       XENVIRONMENT
66               to get the name of a resource file that  overrides  the  global
67               resources stored in the RESOURCE_MANAGER property.
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69       XSCREENSAVER_WINDOW
70               The window ID to use with --root.
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SEE ALSO

73       X(1), xscreensaver(1), xlock(1)
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76       Copyright © 1993 by Greg Bowering.
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78       Permission  to  use, copy, modify, and distribute this software and its
79       documentation for any purpose and without fee is hereby  granted,  pro‐
80       vided  that  the  above  copyright notice appear in all copies and that
81       both that copyright notice and this permission notice  appear  in  sup‐
82       porting documentation.
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AUTHOR

85       Greg Bowering <gb@pobox.com>, 1993.
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87       Ability  to run standalone or with xscreensaver added by Jamie Zawinski
88       <jwz@jwz.org>, 10-May-97.
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92X Version 11               6.08-1.fc38 (17-Oct-2023)                  grav(6x)
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